I don't know the seller, but here is a used 550B for sale:
https://www.24hourcampfire.com/ubbt...l/fs-zeiss-victory-fl-10x42-dillon-rl550

I don't think that $385, shipped, was a bad deal. The seller also posted that he was open to reasonable offers.

Good luck with whatever you decide!

Thoroughly enjoying Alaska since 2001.